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Finding the Fourth Proportional to 285,894.72, 394,534.97 and 158,570.31

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Solution

The fourth proportional to 285,894.72, 394,534.97 and 158,570.31 is: 218,827.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,894.72 : 394,534.97 = 158,570.31 : x
  2. Step 2: Convert to fraction form
    285,894.72/394,534.97 = 158,570.31/x
  3. Step 3: Cross multiply
    285,894.72x = 394,534.97 × 158,570.31
  4. Step 4: Simplify right side
    285,894.72x = 62,561,534,391.92
  5. Step 5: Solve for x
    x = 62,561,534,391.92/285,894.72
  6. Step 6: Final answer
    x = 218,827.18

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.